CN104073587A - Method for converter furnace vanadium refining - Google Patents
Method for converter furnace vanadium refining Download PDFInfo
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- CN104073587A CN104073587A CN201410347138.9A CN201410347138A CN104073587A CN 104073587 A CN104073587 A CN 104073587A CN 201410347138 A CN201410347138 A CN 201410347138A CN 104073587 A CN104073587 A CN 104073587A
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Abstract
The invention discloses a method for converter furnace vanadium refining. The method comprises a top lance oxygen blowing stage and a top lance inactive gas blowing stage executed after the top lance oxygen blowing stage, wherein the top lance oxygen blowing stage comprises the step that from the start of vanadium refining blowing to 210-270 s after vanadium refining blowing, a top lance is used for blowing oxygen into a converter bath; the top lance inactive gas blowing stage comprises the step that from finish of the top lance oxygen blowing stage to the termination of vanadium blowing, the top lance is used for blowing an inactive gas to the converter bath. The method provided by the invention also comprises the steps that the first batch of coolant is added into the converter bath at the start or before the top lance oxygen blowing stage, and the second batch of coolant material is added into the converter bath after vanadium refining blowing is performed for 100-140 s. According to the method for converter furnace vanadium refining, the adding amount of the coolant in the vanadium refining blowing process is reduced.
Description
Technical field
The invention belongs to field of iron and steel smelting, specifically, the present invention relates to a kind of method of vanadium extraction by converter blowing.
Background technology
Vanadium extraction by converter blowing is that vanadium-bearing hot metal is blended in converter, utilize high speed pure oxygen jet to stir vanadium-bearing hot metal, at least a portion of silicon in molten iron, vanadium, manganese, titanium, iron is oxidized to stable oxide compound, and the barium oxide combination of formation is called vanadium slag, and the molten iron after vanadium extraction is called half steel.Because the barium oxide proportion forming is less than half steel, utilize converter that half steel is flowed in half cylinder of steel from tap hole, vanadium slag is stayed in stove, and half steel is as the raw material of lower operation converter steelmaking, and vanadium slag is poured in slag ladle from fire door, produces the raw material of vanadium goods as lower operation.
Vanadium extracting process is the oxidation reaction process of the elements such as iron in molten iron, vanadium, carbon, silicon, manganese, titanium, phosphorus, sulphur, the thermodynamics and kinetics condition when speed that the oxidizing reaction of these elements is carried out depends on the chemical composition of molten iron itself and blows vanadium.In oxygen gesture figure, carbon oxygen gesture line and vanadium oxygen gesture line have an intersection point, and this puts corresponding temperature and is called carbon vanadium invert point, and lower than this temperature, vanadium has precedence over oxidation of coal, and higher than this temperature, carbon has precedence over vanadium oxidation.Vanadium extraction is exactly the principle of utilizing selective oxidation, adopts high speed pure oxygen jet in top blown converter, vanadium-bearing hot metal to be stirred, and the vanadium in molten iron is oxidized to a kind of physical-chemical reaction process of the barium oxide that high price is stable.
The vanadium extraction by converter blowing operation of prior art is mainly by refrigerant being added molten bath to control bath temperature below carbon vanadium invert point, thus the object that reaches vanadium and protect carbon.But refrigerant main component is FeO, SiO
2deng, in the time that refrigerant add-on is excessive, can cause foreign matter content in vanadium slag to rise, dilute the content of Vanadium in Vanadium Residue oxide compound; In the time that refrigerant add-on is very few, can cause bath temperature higher than carbon vanadium invert point, be unfavorable for the oxidation of vanadium, cause in molten steel content of vanadium higher, vanadium runs off serious.
Summary of the invention
One object of the present invention is to overcome the deficiency of above-mentioned technology, provides a kind of and can reduce refrigerant add-on and improve the vanadium extraction by converter blowing method of Vanadium in Vanadium Residue recovery rate.
Another object of the present invention is to overcome the deficiency of above-mentioned technology, and a kind of vanadium extraction by converter blowing method of the content that can improve carbon in half steel is provided.
Vanadium extraction by converter blowing method according to the present invention comprises the top rifle oxygen blast stage and the top rifle of execution after the rifle oxygen blast stage of top blows the inactive gas stage, wherein, the top rifle oxygen blast stage comprises: start, within the time of vanadium extraction blowing 210s～270s, to use top rifle to converter molten pool oxygen blast in vanadium extraction blowing; Top rifle blows the inactive gas stage and comprises: after the rifle oxygen blast stage of top, to the time of vanadium extraction blow end point, use top rifle to blow inactive gas to converter molten pool; Described method also comprises: in the time that the top rifle oxygen blast stage starts or before first refrigerant is joined to converter molten pool, and in the time of vanadium extraction blowing 100s～140s, second batch refrigerant is joined to converter molten pool; Wherein, refrigerant comprises at least one in cold pressing block, pig, iron scale and pellet, and cold pressing block is that converter dust-removing ash and/or iron scale pass through the ball piece of binding agent compression moulding.
According to exemplary embodiment of the present invention, can in the time that 115s～125s is blown in vanadium extraction, second batch refrigerant be joined to converter molten pool.
According to exemplary embodiment of the present invention, first refrigerant add-on can be 9kg/t
molten iron～11kg/t
molten iron, second batch refrigerant add-on can be 11kg/t
molten iron～13kg/t
molten iron.
According to exemplary embodiment of the present invention, start, in the top rifle oxygen blast stage of vanadium extraction blowing 100s～140s, can control top gun gun bit at 1.5m～1.8m in vanadium extraction blowing; Then in the remaining time in the rifle oxygen blast stage of top, can control top gun gun bit at 1.8m～2.2m; Blow in the inactive gas stage at top rifle, can control top gun gun bit at 1.5m～1.8m.
According to exemplary embodiment of the present invention, the oxygen flow in the rifle oxygen blast stage of top can be 22000m
3/ h～24000m
3/ h, the inactive gas flow that top rifle blew in the inactive gas stage can be 22000m
3/ h～24000m
3/ h.
According to exemplary embodiment of the present invention, in cold pressing block, pig, iron scale and pellet, all comprise FeO, in refrigerant, the content of FeO can be not less than 50wt%.
According to exemplary embodiment of the present invention, refrigerant can comprise cold pressing block, and the granularity of cold pressing block can be 30mm～70mm.
According to exemplary embodiment of the present invention, can use top blown converter or top and bottom combined blown converter to carry out vanadium extraction blowing.
According to exemplary embodiment of the present invention, vanadium-bearing hot metal is the molten iron obtaining after blast-furnace smelting containing coulsonite, described molten iron can comprise: the V of S, the 0.3wt%～0.8wt% of P, the 0.06wt%～0.10wt% of Mn, the 0.60wt%～0.80wt% of the C of 4.3wt%～4.8wt%, the Si of 0.1wt%～0.8wt%, 0.18wt%～0.28wt%, the Ti of 0.19wt%～0.25wt%, all the other are iron and inevitable impurity.
According to exemplary embodiment of the present invention, the temperature of the vanadium-bearing hot metal before vanadium extraction blowing is 1280 DEG C～1320 DEG C.
According to the method for vanadium extraction by converter blowing of the present invention, carry out the conversion of oxygen and nitrogen by reasonably controlling the refrigerant joining day and/or rationally controlling top rifle, can significantly reduce refrigerant add-on in vanadium extracting process and improve the recovery rate of the vanadium in the vanadium slag of blowing product.In addition, by reasonable control top gun gun bit, select the add-on of suitable refrigerant and/or definite refrigerant, can also improve the carbon content in the half steel of bessemerizing after vanadium extraction.
Embodiment
The process for extracting vanadium of prior art is mainly by refrigerant being added molten bath bath temperature is controlled at below carbon vanadium invert point, thus the object that reaches vanadium and protect carbon.But refrigerant main component is FeO, SiO
2deng, in the time that refrigerant add-on is excessive, can cause foreign matter content in vanadium slag to rise, dilute the content of Vanadium in Vanadium Residue oxide compound; In the time that refrigerant add-on is very few, can cause bath temperature higher than carbon vanadium invert point, be unfavorable for the oxidation of vanadium, cause in molten steel content of vanadium higher, vanadium runs off serious.
The present invention is directed to the deficiencies in the prior art, a kind of method of vanadium extraction by converter blowing is provided.The method according to this invention comprises the top rifle oxygen blast stage and the top rifle of execution after the rifle oxygen blast stage of top blows the inactive gas stage.For example blowing, to the time of 210s～270s (, 220s, 240s or 260s) in beginning vanadium extraction is the top rifle oxygen blast stage, main by carrying out the oxidizing reaction of top rifle oxygen blast with the vanadium in promotion molten bath.For reducing the rising of bath temperature in top rifle oxygen blast phase process, start (in vanadium extraction blowing, rifle under oxygen rifle) time or when 100s～140s before and in vanadium extracting process (for example, when 110s, 120s or 130s), respectively refrigerant is added to molten bath, to guarantee containing sufficient FeO in the irony first slag in the molten bath in rifle oxygen blast stage, top, be beneficial to the oxidizing reaction of the vanadium in molten iron.Top rifle to blow end point after the rifle oxygen blast stage of top blows the inactive gas stage, FeO in the main irony first slag that relies on the generation of top rifle oxygen blast stage reacts with the vanadium of lower aq in half steel, and half steel temperature is gradually from being reduced to lower than carbon vanadium invert point higher than carbon vanadium invert point.Aforesaid operations not only can significantly reduce the add-on of refrigerant in vanadium extraction converting process, but also can improve the C content in the half steel of vanadium extraction terminal.
Specifically describe vanadium extraction by converter blowing method of the present invention below in conjunction with exemplary embodiment.
First, for example start, to the time of vanadium extraction blowing 210s～270s (, 220s, 240s or 260s) in vanadium extraction blowing, use top rifle to oxygen blast in the vanadium-bearing hot metal in molten bath.Wherein, in the time that vanadium extraction blowing starts (, rifle under oxygen rifle) or add before first refrigerant to molten bath.Along with the reduction of (FeO) content in the rising of converter molten pool temperature and molten bath slag, in the time of the 100s～140s of vanadium extraction blowing, second batch refrigerant is added molten bath by when 130s (for example, 110s, 120s or).
Specifically, vanadium extraction by converter blowing process is the redox processes of (FeO) in vanadium and the slag in vanadium-bearing hot metal, and the oxidizing reaction rate of vanadium depends on the thermodynamics and kinetics condition in chemical composition and the vanadium extraction reaction process of vanadium-bearing hot metal itself.In oxygen gesture figure, the intersection point temperature (for example about 1361 DEG C) of carbon oxygen gesture line and vanadium oxygen gesture line is carbon vanadium invert point, but carbon vanadium invert point in actual vanadium extraction by converter blowing process can raise along with the increase of the rising of the concentration of the vanadium in molten iron and oxygen partial pressure, and along with the reduction of the concentration of the vanadium in vanadium-bearing hot metal and reduce.When the temperature of vanadium-bearing hot metal is during lower than carbon vanadium invert point, vanadium can have precedence over oxidation of coal, and when vanadium-bearing hot metal temperature is during higher than carbon vanadium invert point, carbon has precedence over vanadium oxidation.The process of vanadium extraction by converter blowing is exactly to utilize the principle of selective oxidation, adopt top rifle winding-up pure oxygen jet vanadium-bearing hot metal to be stirred to change the thermodynamics and kinetics condition of vanadium-bearing hot metal in molten bath, thereby promote the vanadium of the lower valency in vanadium-bearing hot metal to be oxidized to the process of the oxide compound of the stable vanadium of high valence state.
To vanadium extraction blowing 210s～270s (for example start in vanadium extraction blowing, 220s, 240s or 260s) time in, at least a portion of the elements such as iron in vanadium-bearing hot metal, silicon, manganese, chromium can with slag in (FeO) there is redox reaction and release of heat, can the raise temperature in molten bath of the heat discharging, has also reduced the rate of oxidation of vanadium simultaneously.Therefore, in the time that vanadium extraction blowing starts (, rifle under oxygen rifle) or before first refrigerant is added molten bath to be used for reducing the initial temperature of vanadium-bearing hot metal, can extend like this vanadium extraction time of vanadium-bearing hot metal and improve the oxidation efficiency of vanadium.In addition, refrigerant also provides (FeO) to promote the carrying out of oxidizing reaction of vanadium in the slag for molten bath.Refrigerant comprises cold pressing block, pig, iron scale and at least one of the pellet of blast furnace ironmaking, and wherein, cold pressing block is that converter dust-removing ash and/or iron scale are by the ball piece of binding agent compression moulding.
Along with the carrying out of vanadium extraction reaction, the oxidation of the elements such as iron in vanadium-bearing hot metal, silicon, manganese, chromium impels bath temperature to raise.In the time of the 100s～140s of vanadium extraction blowing (for example, when 110s, 120s or 130s), preferably, in the time of the 115s～125s of vanadium extraction blowing (for example, when 120s), second batch refrigerant is added to molten bath, can reduce like this rising of the temperature of vanadium-bearing hot metal in vanadium extracting process, the carbon of avoiding bath temperature to cause higher than carbon vanadium invert point has precedence over vanadium oxidation, can also improve like this content of the carbon in the half steel of the vanadium extraction product after vanadium extraction by converter blowing.In addition, add second batch refrigerant can also improve the content of (FeO) in the slag in molten bath, promote the carrying out of vanadium extraction reaction.
Can be the molten iron obtaining after blast-furnace smelting containing coulsonite according to the vanadium-bearing hot metal of the raw material as vanadium extraction by converter blowing of the present invention.Described molten iron can comprise the V of S, the 0.3wt%～0.8wt% of P, the 0.06wt%～0.10wt% of Mn, the 0.60wt%～0.80wt% of Si, the 0.18wt%～0.28wt% of C, the 0.1wt%～0.8wt% of 4.3wt%～4.8wt%, the Ti of 0.19wt%～0.25wt%, and all the other are iron and inevitable impurity.According to exemplary embodiment of the present invention, the temperature of the vanadium-bearing hot metal before vanadium extraction blowing can be 1280 DEG C～1320 DEG C.
According to exemplary embodiment of the present invention, can under the rifle of top, before rifle, add first refrigerant to reduce the initial temperature of vanadium-bearing hot metal, improve vanadium extraction time and the vanadium extraction efficiency of vanadium-bearing hot metal and improve the content of (FeO) in the vanadium extraction slag at blowing initial stage.
According to exemplary embodiment of the present invention, the main component of refrigerant comprises FeO and SiO
2, the addition of refrigerant is crossed the content of the impurity in conference raising slag, and the content of the impurity increasing in slag has diluted the content of the barium oxide in slag; The too small effect that can not reach cooling bath temperature of refrigerant add-on, is unfavorable for the oxidation of vanadium, has also increased the content of the vanadium in half steel in vanadium extraction product simultaneously, causes vanadium to run off serious.Because the vanadium-bearing hot metal temperature at blowing initial stage is lower, now the addition of first refrigerant can be 9kg/t
molten iron～11kg/t
molten iron; Along with the rising of bath temperature, the addition of second batch refrigerant can be 11kg/t
molten iron～13kg/t
molten iron, can avoid like this bath temperature higher than carbon vanadium invert point, promote the carrying out of the oxidizing reaction of vanadium, the addition of refrigerant be can also reduce like this, thereby the foreign matter content in slag and the content that has improved the vanadium in slag reduced.
According to exemplary embodiment of the present invention, preferably, vanadium extraction blowing start in the time of vanadium extraction blowing 100～140s (for example, vanadium extraction blowing started in the time of vanadium extraction blowing 120s), top gun gun bit can be controlled at 1.5m～1.8m, can increase like this stirring of oxygen jet to molten bath, promote the carrying out of the redox reaction of the vanadium in vanadium-bearing hot metal and (FeO) in slag.Along with the carrying out of the oxidizing reaction of vanadium, (FeO) content in slag reduces gradually, now can improve top gun gun bit to 1.8m～2.2m and can keep this top gun gun bit to the top rifle oxygen blast stage to finish, to promote the oxidation of the Fe in molten bath, thereby improve (FeO) content and the carrying out that promotes vanadium extraction reaction in slag.
According to exemplary embodiment of the present invention, the oxygen flow in the rifle oxygen blast stage of top can be controlled at 22000m
3/ h～24000m
3/ h, but the present invention is not limited to this.
According to exemplary embodiment of the present invention, in cold pressing block, pig, iron scale and pellet as refrigerant, all comprise FeO, the FeO content in refrigerant can be not less than 50wt%.Can, for providing a large amount of (FeO) to promote the carrying out of vanadium extraction reaction in slag, can also reduce like this add-on of refrigerant to reduce the foreign matter content in slag like this.
According to exemplary embodiment of the present invention, when refrigerant comprises cold pressing block, cold pressing block can be the ball bulk of 30mm～70mm, but the present invention is not limited to this.
According to exemplary embodiment of the present invention, can use top blown converter or top and bottom combined blown converter to carry out vanadium extraction blowing operation to vanadium-bearing hot metal.When using top and bottom combined blown converter to carry out vanadium extraction when operation blowing to vanadium-bearing hot metal, using top blow oxygen lance in molten bath when oxygen blast, can use end rifle for example, to blowing inactive gas (, nitrogen or rare gas element) in molten bath molten bath to be stirred.
Then, along with the carrying out of vanadium extraction reaction and the rising of bath temperature, in the time of vanadium extraction blowing 210s～270s, when 260s (for example, 220s, 240s or) is in the time of vanadium extraction blow end point, blow inactive gas (for example, nitrogen or rare gas element) with top rifle.
Specifically, along with the reduction of the concentration of the vanadium in vanadium-bearing hot metal, the invert point of vanadium reduces, and bath temperature raises gradually and causes the rate of oxidation of vanadium to reduce, and the rate of oxidation of carbon raises.In the time of the 210s～270s of vanadium extraction blowing (for example, when 220s, 240s or 260s), bath temperature now may be a little more than carbon vanadium invert point, at this temperature, continue oxygen blast meeting to molten bath and take off in a large number the carbon in vanadium-bearing hot metal, cause steel-making converter can not add steel scrap or cause converter steelmaking to occur deeply blowing, and vanadium extraction efficiency significantly reduces.In this case, top rifle oxygen blast being converted to top rifle blows inactive gas (for example, nitrogen or rare gas element) molten bath is stirred.Blow inactive gas at top rifle and vanadium-bearing hot metal is carried out in the process of vanadium extraction operation, abundant (FeO) mainly generating in slag by the top rifle oxygen blast stage and the redox reaction of vanadium reach the object of vanadium extraction.In the time of the 210s～270s of vanadium extraction blowing (for example, when 220s, 240s or 260s), in converter molten pool slag, generate abundant (FeO), by blowing inactive gas, cooling is stirred in molten bath in this case, bath temperature is reduced to below carbon vanadium invert point, thereby can promotes the carrying out of (FeO) in slag and the redox reaction of vanadium.In addition, in the time of vanadium extraction blowing 210s～270s, when 260s (for example, 220s, 240s or) used top rifle nitrogen blowing also to replace the add-on of refrigerant with refrigerant in reducing bath temperature and reducing vanadium extraction by converter blowing converting process in the time of vanadium extraction blow end point.In process molten bath being stirred in top rifle nitrogen flushing, along with the reduction gradually of bath temperature, in vanadium-bearing hot metal, the rate of oxidation of carbon also reduces gradually, and this just can improve the content of the carbon in the half steel in vanadium extraction product.In addition, top rifle nitrogen flushing has also reduced the TFe content in slag, has improved the Fe recovery rate of half steel.
According to exemplary embodiment of the present invention, in the time of vanadium extraction blowing 210s～270s (for example, when 220s, 240s or 260s) in the time of vanadium extraction blow end point, top gun gun bit can be controlled at 1.5m～1.8m, can increase like this nitrogen to the stirring in molten bath with reduce bath temperature, promote vanadium and (FeO) redox reaction in slag in vanadium-bearing hot metal, thereby reach the object of vanadium guarantor carbon.
According to exemplary embodiment of the present invention, the flow that top rifle blows the inactive gas (for example, nitrogen or rare gas element) in inactive gas stage can be 22000m
3/ h～24000m
3/ h, but the present invention is not limited to this.
As mentioned above, vanadium extraction by converter blowing method according to the present invention has promoted the rate of oxidation of vanadium, and (refrigerant add-on can be controlled in 25kg/t to have reduced the add-on of refrigerant
ironbelow), and for the converter smelting of half steel has ensured sufficient thermal source (the C content in the half steel after vanadium extraction blowing can be controlled in more than 3.90%), improved the steel scrap consumption of half steel converter smelting.In addition, convert top rifle in the blowing later stage to by top rifle oxygen blast and (for example blow inactive gas, nitrogen or rare gas element) molten bath is stirred and reduced (FeO) content in slag, being conducive to slag iron separates, and the iron in slag can settle down quickly after finishing blowing from slag, make bright iron and the content reduction of iron entirely in slag, be conducive to improve the grade of vanadium slag.
Although described the method for vanadium extraction by converter blowing of the present invention with reference to specific embodiment, will be appreciated that the present invention is not limited to above embodiment.
Claims (10)
1. a method for vanadium extraction by converter blowing, is characterized in that, described method comprises the top rifle oxygen blast stage and the top rifle of execution after the rifle oxygen blast stage of top blows the inactive gas stage,
Wherein, the top rifle oxygen blast stage comprises: start, within the time of vanadium extraction blowing 210s～270s, to use top rifle to converter molten pool oxygen blast in vanadium extraction blowing;
Top rifle blows the inactive gas stage and comprises: after the rifle oxygen blast stage of top, to the time of vanadium extraction blow end point, use top rifle to blow inactive gas to converter molten pool;
Described method also comprises: in the time that the top rifle oxygen blast stage starts or before first refrigerant is joined to converter molten pool, and in the time of vanadium extraction blowing 100s～140s, second batch refrigerant is joined to converter molten pool;
Wherein, refrigerant comprises at least one in cold pressing block, pig, iron scale and pellet, and cold pressing block is that converter dust-removing ash and/or iron scale pass through the ball piece of binding agent compression moulding.
2. the method for claim 1, is characterized in that, in the time of vanadium extraction blowing 115s～125s, second batch refrigerant is joined to converter molten pool.
3. the method for claim 1, is characterized in that, first refrigerant add-on is 9kg/t
molten iron～11kg/t
molten iron, second batch refrigerant add-on is 11kg/t
molten iron～13kg/t
molten iron.
4. the method for claim 1, is characterized in that,
Start, in the top rifle oxygen blast stage of vanadium extraction blowing 100s～140s, to control top gun gun bit at 1.5m～1.8m in vanadium extraction blowing;
Then in the remaining time in the rifle oxygen blast stage of top, control top gun gun bit at 1.8m～2.2m;
Blow in the inactive gas stage at top rifle, control top gun gun bit at 1.5m～1.8m.
5. the method for claim 1, is characterized in that, the oxygen flow in the rifle oxygen blast stage of top is 22000m
3/ h～24000m
3/ h, the inactive gas flow that top rifle blew in the inactive gas stage is 22000m
3/ h～24000m
3/ h.
6. the method for claim 1, is characterized in that, all comprises FeO in cold pressing block, pig, iron scale and pellet, and in refrigerant, the content of FeO is not less than 50wt%.
7. the method for claim 1, is characterized in that, refrigerant comprises cold pressing block, and the granularity of cold pressing block is 30mm～70mm.
8. the method for claim 1, is characterized in that, uses top blown converter or top and bottom combined blown converter to carry out vanadium extraction blowing.
9. the method for claim 1, it is characterized in that, vanadium-bearing hot metal is the molten iron obtaining after blast-furnace smelting containing coulsonite, described hot metal ladle contains: the V of S, the 0.3wt%～0.8wt% of P, the 0.06wt%～0.10wt% of Mn, the 0.60wt%～0.80wt% of the C of 4.3wt%～4.8wt%, the Si of 0.1wt%～0.8wt%, 0.18wt%～0.28wt%, the Ti of 0.19wt%～0.25wt%, all the other are iron and inevitable impurity.
10. the method for claim 1, is characterized in that, the temperature of the vanadium-bearing hot metal before vanadium extraction blowing is 1280 DEG C～1320 DEG C.
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| CN104673956A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Method for extracting vanadium and chromium in converter |
| CN104673958A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Method for extracting vanadium and chromium by using top-bottom combined blowing converter |
| CN104673959A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Method for extracting vanadium and chromium by using top-bottom combined blowing converter |
| CN104694701A (en) * | 2015-03-16 | 2015-06-10 | 攀钢集团研究院有限公司 | Method for agitating and extracting vanadium and chromium from vanadium and chromium containing molten iron |
| CN105039633A (en) * | 2015-08-18 | 2015-11-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from converter |
| CN105112596A (en) * | 2015-08-20 | 2015-12-02 | 四川德胜集团钒钛有限公司 | Vanadium extraction process for low-silicon-titanium molten iron |
| CN107385265A (en) * | 2017-07-21 | 2017-11-24 | 湖南众鑫新材料科技股份有限公司 | A kind of high vanadium magnet prepares the production method of ferrovanadium nitride alloy |
| CN108265183A (en) * | 2018-04-16 | 2018-07-10 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN108265185A (en) * | 2018-04-16 | 2018-07-10 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
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| CN108359817A (en) * | 2018-04-16 | 2018-08-03 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN108359818A (en) * | 2018-04-16 | 2018-08-03 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN108425024A (en) * | 2018-04-16 | 2018-08-21 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN108425026A (en) * | 2018-04-16 | 2018-08-21 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN108425025A (en) * | 2018-04-16 | 2018-08-21 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN109136445A (en) * | 2018-09-04 | 2019-01-04 | 云南德胜钢铁有限公司 | A kind of vanadium extraction half steel processing technology |
| CN112662897A (en) * | 2020-12-30 | 2021-04-16 | 黑龙江建龙钢铁有限公司 | Process for improving vanadium recovery rate of vanadium extraction converter |
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| CN104673956A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Method for extracting vanadium and chromium in converter |
| CN104673958A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Method for extracting vanadium and chromium by using top-bottom combined blowing converter |
| CN104673959A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Method for extracting vanadium and chromium by using top-bottom combined blowing converter |
| CN104694701A (en) * | 2015-03-16 | 2015-06-10 | 攀钢集团研究院有限公司 | Method for agitating and extracting vanadium and chromium from vanadium and chromium containing molten iron |
| CN105039633A (en) * | 2015-08-18 | 2015-11-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from converter |
| CN105112596A (en) * | 2015-08-20 | 2015-12-02 | 四川德胜集团钒钛有限公司 | Vanadium extraction process for low-silicon-titanium molten iron |
| CN107385265A (en) * | 2017-07-21 | 2017-11-24 | 湖南众鑫新材料科技股份有限公司 | A kind of high vanadium magnet prepares the production method of ferrovanadium nitride alloy |
| CN107385265B (en) * | 2017-07-21 | 2019-04-05 | 湖南众鑫新材料科技股份有限公司 | A kind of high vanadium magnet prepares the production method of ferrovanadium nitride alloy |
| CN108265185A (en) * | 2018-04-16 | 2018-07-10 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
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| CN108425025A (en) * | 2018-04-16 | 2018-08-21 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN108265183A (en) * | 2018-04-16 | 2018-07-10 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN109136445A (en) * | 2018-09-04 | 2019-01-04 | 云南德胜钢铁有限公司 | A kind of vanadium extraction half steel processing technology |
| CN112662897A (en) * | 2020-12-30 | 2021-04-16 | 黑龙江建龙钢铁有限公司 | Process for improving vanadium recovery rate of vanadium extraction converter |
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